Magazine frame



5 j if 3 I 7 c A, b m e 1/ m M A 5 f F. G. ACOMB MAGAZINE FRAME Filed May 20, 1942 Patented Oct. 26, 1943 i i UNITED q STATES; PATENTJOFFICE .7 2,332,545 I k IMAGAZINE FRAME 4 Frederic G; Acomb, Watchung N. J.. Application May 29, 1942. Serial No. 443,813

2 Claims.

This invention relates to magazine frames for tools using detachable blades and has for its principal object the provision of a hack saw frame with provision for the storage of additional blades and differs from previous saw frames in that the present device is simple and sturdy without need for frame adjustment, without looking devices, and free from pivoted accessories.

An important object of the invention is to provide a handle portion, preferably a one-piece member, suitable for use with any one of a set of different length tubular frames, so that the assembly can be stored in a restricted space, and in which such handle portion extends over the blade so as to permit the body weight or pressure to bear down upon the work with the least effort on the part of the user, and free from interference with the cutting edge of the blade.

A still further object of the invention is to provide a set of tubular frames, the resilient cap of each of which prevents loss of the spare blades and serves as a lining for the socket end of the handle portion thus permitting a more snug fit of the two parts of the magazin frame.

In the drawing:

Figure l is an elevation of the magazine frame.

Figure 2 is a section through the socket portion taken on line 2-2 of Fig. 1.

Figure 3 is a perspective of a cap.

Figures 4 and 5 are sections taken on lines 4-4 and 55 respectively of Figure 1.

Figure 6 is a perspective view of another form 1 of the cap.

In addition to the cutting blade II! the complete tool consists of a tubular frame H with its blade holding hook and a handle portion l2 carry- .ing a second and adjustable blad holding hook. In addition to these necessary parts there are caps for each of the tubular frames, and an antirattle device but these are purely optional and form no part of the invention in its simplest state.

The tubular frame ll includes a back I 4 and an arm 15, the latter carrying near its free end in any manner a headed anchoring hook for the saw blade l0. As illustrated the tubular frame I I is formed from rounded corner, rectangular stock opened at it to form a non-circular recess to receive a similarly shaped plunger I! having a fairly large head l8and the usual inclined pin 9. The plunger not only anchors the saw blade end but, because it cannot rotate, aids in keeping the blade straight in the frame When it is drawn taut. The plunger may be fast to the arm l5 or it may be slidable in its recess, the pin and'the head forming the two stops to prevent loss of the plunger. The length of the back M depends upon the length of the saw blades used with the frame as the back is not adjustable in its receiving socket of the handle portion.

The handle portion is preferably of metal either of pressed sheet material or formed as a casting.

The term casting as used in the specification and claims is to be understood a meaning the handle portion however made and whether of metal, plastic, or other material. The larger portion of this casting is th hollow handle 26 which preferably is bounded by concentric right angular arcs or other curves tangent to the top and bottom of the hollow socket portion 2| which receives the end of the back M. of the tubular frame. The curve of the handle forms a stop for the tubular saw blade holdin frame.

' At the bottom of the handle there is a shoulder 22 and below this is the anchoring lug 23 thru which. there is a non-circular hole to slidingly receive the retaining rod 24 provided with square threads 25 so that this rod will not rotate in the lug. The rod 24 is flattened in the usual manner at 26 and carries an inclined pin 21 so that the saw blade may be made taut by turning the thumb nut 28 which engages the'lug 23 either directly or through a washer 29'as sometimes used. The cross piece 30 is a compression member serving both as a strut and a guard and forming with the handle 20 a. hand hole 3|. Referring to Figures 2, 3 and 6 an optional cap 32 or 33 may be provided for eaoh of the several tubular frames which comprise an asv I sembly, and this member may completely surround the end of the frame end as in Figure 2 or in Fig. 6 or itmay be a simple U-shaped piece of fiat spring steel as in Figure 3, snugly embracing the frame end to prevent loss of'the spare blades. The cap also serves as a linerfor the socket end 2! of the casting making it posapart, but cap 33 is biased as at to engage the. tubular frame midway between its ownend and i the end of the tubular frame so that it is retained on the back l4 when the reservoir frame is not in use; that is, when a different length tubular frame H is being used with the handle portion I I2. In Figure 3 this biasing of the cap is much exaggerated as otherwise it would not be seen.

The optional anti-rattler 31 is a single piece of flat spring metal and is principally useful when only one or two blades are in the chamber or reservoir of the frame. It takes very little space as when the reservoir is full its two sides are in contact with each other.

What I claim is: V

1. An integral end-piece for a magazine hack saw frame of the type in which a hack saw blade is secured between the free end of the frame and the bottom of the handle; said end-piece consisting of a curved hollow major portion forming the handle of the saw, an upper extension pro J'ecting from the handle and having a cavity therein communicating with the hollow space of the handle for receiving one end of the frame, a lower portion extending from the handle at right angles to the upper extension and having an opening to receive means for tightening the hack saw blade, and a reinforcing and protecting cross bar extending from one free end of the end-piece to the other for strengthening the handle and for protecting the hand of the user, the bar being positioned roughly at 45 to both the hack saw blade and the upper extension whereby the cross bar is substantially horizontal when sawing downward at a 45 angle.

2. In a hack saw support, a handle, a hollow frame having a loose fit with the handle, and a cap snugly fitting between the handle and the frame, slidable with respect to both, and having a free end exposed when the parts are assembled so that the free end may be manipulated to retain the cap either in the handle or on the fram when these parts are separated.

FREDERIC G. ACOMB. 

